A robust comparison of dynamical scenarios in a glass-forming liquid

Physical Chemistry Chemical Physics : PCCP
Alessandro VispaLuis Carlos Pardo

Abstract

We use Bayesian inference methods to provide fresh insights into the sub-nanosecond dynamics of glycerol, a prototypical glass-forming liquid. To this end, quasielastic neutron scattering data as a function of temperature have been analyzed using a minimal set of underlying physical assumptions. On the basis of this analysis, we establish the unambiguous presence of three distinct dynamical processes in glycerol, namely, translational diffusion of the molecular centre of mass and two additional localized and temperature-independent modes. The neutron data also provide access to the characteristic length scales associated with these motions in a model-independent manner, from which we conclude that the faster (slower) localized motions probe longer (shorter) length scales. Careful Bayesian analysis of the entire scattering law favors a heterogeneous scenario for the microscopic dynamics of glycerol, where molecules undergo either the faster and longer or the slower and shorter localized motions.

References

Oct 1, 1995·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·J WuttkeF Fujara
Nov 1, 1996·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·J WuttkeW Petry
May 9, 1994·Physical Review Letters·J WuttkeH Sillescu
Dec 12, 2001·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Y GebremichaelS C Glotzer
Aug 11, 2005·Physical Review Letters·P LunkenheimerA Loidl
Mar 16, 2007·Physical Review Letters·F Fernandez-AlonsoK W Herwig
Jun 30, 2007·The Journal of Chemical Physics·F Fernandez-AlonsoJ F C Turner
Oct 13, 2007·Physical Review Letters·Pinaki ChaudhuriWalter Kob
Feb 23, 2010·Nature Materials·Hajime TanakaKeiji Watanabe
Nov 5, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·R BusselezD Morineau
Dec 21, 2011·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·L C PardoJ Ll Tamarit
Jul 16, 2013·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Tatsuya KikuchiMasatoshi Arai
Sep 27, 2014·Physical Review Letters·Marcus T CiceroneMadhusudan Tyagi

❮ Previous
Next ❯

Citations

Feb 10, 2017·The Journal of Chemical Physics·Marcus T Cicerone, Madhusudan Tyagi
Sep 19, 2020·Physical Review. E·Alessio De FrancescoAlessandro Cunsolo

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.